Texas Code of Criminal Procedure - CRIM P Art. § 2A.051. General Powers and Duties of Peace Officers

(1) preserve the peace within the officer's jurisdiction using all lawful means;

(2) in every case authorized by this code, interfere without a warrant to prevent or suppress crime;

(3) execute all lawful process issued to the officer by a magistrate or court;

(4) give notice to an appropriate magistrate of all offenses committed in the officer's jurisdiction, where the officer has good reason to believe there has been a violation of the penal law;

(5) when authorized by law, arrest an offender without a warrant so the offender may be taken before the proper magistrate or court and be tried;

(6) take possession of a child under Article 63.009(g); and

(7) on a request made by the Texas Civil Commitment Office, execute an emergency detention order issued by that office under Section 841.0837, Health and Safety Code.